A Value Output block is used to provide output value from a Sub-flow to outside of the block. The Value Output block shows the following properties:
The title of the block “Value Output” can be changed by double-clicking on it and typing in a new title.
Output defines the value that can be output from the sub-flow. So to make it available outside of the sub-flow, the ‘output’ should be connected to desired property of required block.
Updated January 12th 2018.